Given, a list of tuples, the task is to multiply the elements of the tuple and return a list of the multiplied elements.
Examples:
Input: [(2, 3), (4, 5), (6, 7), (2, 8)]
Output: [6, 20, 42, 16]Input: [(11, 22), (33, 55), (55, 77), (11, 44)]
Output: [242, 1815, 4235, 484]
There are multiple ways to multiply the elements of a tuple. Let’s see a couple of them.
Method 1: Using Iteration This is the most naive method to achieve a solution to this task. In this, we iterate over the whole list of tuples and multiply the elements in each tuple to get the list of elements.
Python3
# Python code to convert list of tuple into list of elements# formed by multiplying elements of tuple.# Input list initialisationInput = [(2, 3), (4, 5), (6, 7), (2, 8)]# Output list initialisationOutput = []# Iteration to multiply element and append multiplied element in# new listfor elem in Input: temp = elem[0]*elem[1] Output.append(temp)# printing outputprint("The original list of tuple is ")print(Input)print("\nThe answer is")print(Output) |
Output:
The original list of tuple is [(2, 3), (4, 5), (6, 7), (2, 8)] The answer is [6, 20, 42, 16]
# Method 2: Using list comprehension This is the one-liner approach to achieve the solution to this task.
Python3
# Python code to convert list of tuple into list of elements# formed by multiplying elements of tuple.# Input list initialisationInput = [(2, 3), (4, 5), (6, 7), (2, 8)]# Iteration to multiply element and append multiplied element in# new listOutput = [(x * y) for x, y in Input]# printing outputprint("The original list of tuple is ")print(Input)print("\nThe answer is")print(Output) |
Output:
The original list of tuple is [(2, 3), (4, 5), (6, 7), (2, 8)] The answer is [6, 20, 42, 16]
Method 3: Using map() and lambda function
In this method, we use the map() function along with a lambda function to multiply the elements of each tuple.
Python3
#Python code to convert list of tuple into list of elements#formed by multiplying elements of tuple.#Input list initialisationInput = [(2, 3), (4, 5), (6, 7), (2, 8)]#Iteration to multiply element and append multiplied element in#new listOutput = list(map(lambda x: x[0]*x[1], Input))#printing outputprint("The original list of tuple is ")print(Input)print("\nThe answer is")print(Output)#This code is contributed by Edula Vinay Kumar Reddy |
The original list of tuple is [(2, 3), (4, 5), (6, 7), (2, 8)] The answer is [6, 20, 42, 16]
Time Complexity: O(n)
Auxiliary Space: O(n)
Method 4: Using reduce()
Use the reduce() function from the functools module to apply a lambda function to each tuple in the input list. The lambda function multiplies the two elements of the tuple, and reduce() applies this function to each tuple and returns a single value.
- Import the reduce() function from the functools module.
- Initialize the input list of tuples.
- Define a lambda function to multiply the elements of a tuple.
- Apply the lambda function to each tuple in the input list using reduce() function and append the result to the output list using a list comprehension.
- Print the original list of tuples.
- Print the list of multiplied elements.
Below is the implementation of the above approach:
Python3
# Import the reduce function from functools modulefrom functools import reduce# Initialize the input list of tuplesInput = [(2, 3), (4, 5), (6, 7), (2, 8)]# Define a lambda function to multiply the elements of a tuplemultiply = lambda x, y: x * y# Apply the lambda function to each tuple in the input list using reduce function# and append the result to the output list using a list comprehensionOutput = [reduce(multiply, tpl) for tpl in Input]# Print the original list of tuplesprint("The original list of tuple is ")print(Input)# Print the list of multiplied elementsprint("\nThe answer is")print(Output) |
The original list of tuple is [(2, 3), (4, 5), (6, 7), (2, 8)] The answer is [6, 20, 42, 16]
Time Complexity: O(n*k), where n is the number of tuples in the input list and k is the number of elements in each tuple.
Auxiliary Space: O(n*k)
